coladb
v1.0.4
Published
A small library for using IndexedDB in Promise style.
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coladb
A small library for using IndexedDB
in Promise
style. Wrap IDBRequest
to Promise
.
Installation
npm i coladb --save
Usage
Use as module:
import coladb from 'coladb'
async function openDB () {
const db = await coladb.open('dbname', 1, (idb) => {
const store = idb.createObjectStore('user', { autoIncrement: true, keyPath: 'id' })
store.createIndex('uid', 'uid', { unique: true })
store.createIndex('name', 'name')
store.createIndex('birthday', 'birthday')
})
return db
}
async function insertUser (user = {}) {
const db = await openDB()
const transaction = db.transaction('user', 'readwrite')
const store = transaction.objectStore('user')
const id = await store.add(user)
}
Use as script in html file. Import dist/coladb.js
to your project, export as global variable named colaDB
:
<script src="path/to/coladb.js"></script>
<script>
async function main () {
const db = await colaDB.open('dbname', 1, (idb) => {
const store = idb.createObjectStore('user', { autoIncrement: true, keyPath: 'id' })
store.createIndex('uid', 'uid', { unique: true })
store.createIndex('name', 'name')
store.createIndex('birthday', 'birthday')
})
const transaction = db.transaction('user', 'readwrite')
const store = transaction.objectStore('user')
const id = await store.add(user)
}
main()
</script>
API
Contrast to native IndexedDB
, the open
method signature has a little different.
coladb.open(name: string, version?: number, onupgradeneeded?: onupgradeneededFn, onblocked?: onblockedFn)
type onupgradeneededFn = (db, oldVersion: number, newVersion: number) => void
type onblockedFn = (event) => void
Examples
Use Cursor
:
const db = coladb.open('dbname', 1)
const transaction = db.transaction('user', 'readwrite')
const store = transaction.objectStore('user')
let cursor: any = await store.openCursor(IDBKeyRange.bound(1, 10))
cursor = await cursor.continue(8)
console.log(`key: ${cursor.key}, value: ${cursor.value}`)
const key = await cursor.update(user)
More example in test directory
.
Development
dist
npm run dist
Lint
npm run lint
Test
npm run karma:start
npm run karma:run